{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"3001663","name":"SAWYER'S PIT"},"operator":{"type":"operator","id":"0176114","name":"Crown Point Equipment & Supply"},"controller":{"type":"controller","id":"0161580","name":"Peter  Reale; John P  Reale"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L38252","name":"Sawyers Sand & Gravel"},"object":{"type":"mine","id":"3001663","name":"SAWYER'S PIT"},"validFrom":"1950-01-01","validTo":"2022-05-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|L38252|1950-01-01|2022-05-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M38252","name":"Ralph W  Sawyer"},"object":{"type":"mine","id":"3001663","name":"SAWYER'S PIT"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|M38252|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M38252","name":"Ralph W  Sawyer"},"object":{"type":"operator","id":"L38252","name":"Sawyers Sand & Gravel"},"validFrom":"1950-01-01","validTo":"2022-05-17","current":false,"derived":true,"evidenceMineId":"3001663","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|L38252|1950-01-01|M38252|1950-01-01|167622"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0161580","name":"John P  Reale et al"},"object":{"type":"mine","id":"3001663","name":"SAWYER'S PIT"},"validFrom":"2021-04-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|0161580|2021-04-12|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0176114","name":"Crown Point Equipment & Supply"},"object":{"type":"mine","id":"3001663","name":"SAWYER'S PIT"},"validFrom":"2022-05-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|0176114|2022-05-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0161580","name":"John P  Reale et al"},"object":{"type":"operator","id":"0176114","name":"Crown Point Equipment & Supply"},"validFrom":"2022-05-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"3001663","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|0176114|2022-05-18|0161580|2021-04-12|33771"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0161580","name":"Peter  Reale et al"},"object":{"type":"operator","id":"0176114","name":"Crown Point Equipment & Supply"},"validFrom":"2022-05-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"3001663","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3001663|0176114|2022-05-18|0161580|2021-04-12|33772"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3001663","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}